摘要 |
Vapour absorption refrigeration is carried out by condensing, in a condensing stage, a refrigerant in vapour form to obtain condensed refrigerant, being passed into an expansion/evaporation stage in which it is subjected to heat transfer with a higher temperature medium such that at least some of the refrigerant evaporates. Vapourised refrigerant passes from the evaporation stage into an absorption stage in which some of it is absorbed, at a first pressure, into an absorbent, thereby to obtain partially refrigerant-enriched absorbent. This absorbent is contacted, in a compression absorption stage at a second pressure greater than the first pressure, with vapourised refrigerant, rendering refrigerant-enriched absorbent which is passed from the compression absorption stage into a refrigerant regeneration stage, in which refrigerant in vapour form is recovered, rendering refrigerant-depleted absorbent. The recovered refrigerant is recycled to the condensing stage and the refrigerant-depleted absorbent to the absorption stage where it constitutes the absorbent. |